Caliper



B. N. DUDUKIAN.

v CALIPER.

APPLlcATIoN FILED MAR. 9,`192o.

' Patented Sept. 5, 1922.

2 SHEETS-SHEET l.

' w/mfssfs ATTH/VEYS B. N. DUDUKIAN.

CALIPER.

APPLICATION FILED MAR. 9, 1920.

Fatemi' @Sept 59 i922,

2 SHEETS-SHEET 2.

W/T/VESSES ATTORI/EVS latented Sept. 5, I 192.2,

` i rr AZSAZ` BENJAMIN NAHABED DUDUKIANOF sYRAoUsE, NEW YORK.y

CAMPER.

Application sied March 9, 1920. serial No. 364,408. 4

To all whom t may concer/n: i K

Be 1t known that l, BENJAMIN NAHABED DUDUKIAN, a citizen of Armenia, and a resident o1c Syracuse, in the county of Onondaga A:formed with means which vwill permit a quick adjustment of the jaws or arms of the caliper and will at all times show the exact distance therebetween to within a thousandth of an inch., or other distances according to the graduations provided.

A still further object ofthe invention is to provide a caliper to which a micrometer attachment is secured and arranged to show at all times through the use of a moving column ot liquid small fractions ot an inch.

In the accompanying drawings:

Figure 1 is a sideview of a micrometer caliper disclosing an embodiment. of the invention.

Figure 2- is a sectional view through Figure 1 on line 2`-2. Y.

Figure 3 is a transverse sectional view through Figure 1 on line 3 3, the same being on an enlarged scale.

Figure 4: is a sectional view through Figure 2 on line 4 4, the same being on an enlarged scale. y

' Figure 5 is an edge yview of a slightly modified form oiI caliper to that shown in Figure 1 the upper part bciugbroken away and part of the lower part being shown inthe construc-l section for better illustrating tion.

Figure 6 is an edge view of the construction shown in Figure 5, certain parts being shown in section. l p

Figure 7 is a fragmentaryv sectional View through Figure 5, online 7-7.

Figure 8. is a side view with certain parts broken away of a further modified form of the invention to that shown in Figure 5.

Figure 9 is a detail fragmentary' side View of an operating member shown inFigure 8.

Figure 10 4is a fragmentary sectional view through Figure 3 on line 10-10,

i 341 the uplp Y Figure 11 is a fragmentary sectional View through Figure 8 on line 11`-11.

Referring to the accompanying drawings by numerals, 1 and 2 indicate the jaws or arms of the caliper, the operative ends 3 and 4L being designed to be moved through a distance of several inches. These jaws'are pivotally mounted at 5 vand 6 on suitable ears 7 and 8 secured to or formed integral with a tube 9 hereinafter fully described. The short ends 10 and` 1l are pivotally connected at 12 and 13 to the links 14 and 15, .which links in turn are pivot'ally connected at. 16 and 17 to the ears 18 and 19 extending from the sleeve 20, which sleeve is loosely mounted on tube 9,but slides thereon-by reason of the pin 21 extending `through the sleeve 2O and into the slot 22 in tube 9 as shown inv Figure 2.

The tube 9 is provided with threads 23 on one end and with a notch 24 extending from the opposite end so as to disclose the glass or other transparent liquid carrying tube 25. This liquid carrying tube 25k is provided with a collapsible bulb 2.6 oi' any dei sired material, said bulb being at the lower end of tube25-and opposite an adjusting screw 27 as well as opposite the upper end of spring 28, which springfis provided with a stylus 29 extending through an aperture 30 in tube 9. The stylus 29 is designed to be moved longitudinally byreasonof the star shaped wall 31 formed on the interior of the barrel 32. As shown in the drawing .there are ive points jto the star shaped wall31, so that upon one rotation ofithe barrel 32 the stylus 29 `will be-depressed five times and the liquid in the bulb 26 and thetube 25 will be vmoved so that the upper end of the liquid will be substantially at the upper endy that when the end of stylus 29 is engaging the apex 3.3 between the various ,depressions erend of the liquid inthe tube 25 is at t e highest graduation 35 and when `in oneqof the depressions 34 the liquid will kbe at` the lowest` graduation or zero mark of the graduations 35. A second` set 'of graduations 36 is provided on the tube 9 which indicate comparatively large divisions of an inch, whilel the graduations- 35 as shown, indicate thousandths of an inch.

The sleeve 20`is provided with areduced portion 37,l which lco-.actingwith lplate 3,8y

y Afor-ms a groove inwhch the. aJ-inular .bead

"of the tube 25. It is, of course, understood 39 of the cone 40 lits, whereby the cone 40 may freely rotate, but is not allowed any loose motion. The plate 38 may be secured in place in any desired manner, as for instance by a number of screwsj while the cone 40 is preferably threaded into he barrel 32 as shown in Figure 2. Secured to the end of the barrel 32 opposite that carrying the cone 40 is a thimble 4l5 which is held in place by any desired means, as for instance by screws, and which is internally threaded so as to screw over the threads 23 of the tube 9. By this construction and arrangement, whenever the thimble 4l is rotated barrel 32 will be rotated, but tube 9 will be held stationary whereupon the tube will be -moved at all timesiinto the barrel by the coaction of the threads on the thimble 4l and the threads l23. This will vary the position of the graduations 36 so as to indicate in large divisions the distances between the points 3 and 4 of the jaws l and 2. At the same time that the tube 9 is moved longitudinally in respect to the barrel 32 the bulb 26 is being collapsed either once or several times and the liquid 42 is being moved to indicate thousandths of an inch on the graduations 35.

ln the drawings a construction is shown in which the graduations 35 indicate thousandths of an inch, but it will be evident that it could indicate other distances.r for instance in the drawings a five pointed star wall 3l is provided. lf it takes live revolutions of the barrel 32 and the thimhle 41 to shift the points 3 and 4 one inch twenty-.tive graduations on the graduation marks 35 on the tube 9 will indicate thousandths of an inch, the graduations reading both up and down the scale. lt is evident that the starshaped wall 3l could be formed with mor or even less points and the graduation marks 35 varied to indicate five hundredths of an inch7 two thousandths of an inch, or some other distance. rlhe liquid 42 may be any vdesired liquid, preferably a colored viscous liquid which will not drop oftl the tube, as for instance glycerine.

ln Figures 5 to 7 inclusive will be seen a modified form of the invention in which the arm l is provided with what may be termed a frame or casing 43, while the arm 2 is provided with an extension 44 having a rack 45 at the extreme end. rllhis rack is constructed to co-act with the worm wheel 4G,

which worm wheel is rigidly secured to the shaft 47 carrying a thumb member 48. Thumb member 48 is provided with graduations 49 co-acting with graduations 50 which are formed on the projection extending from the frame 48. A. star wheel 5l is also rigidly secured to the shaft 47 which shaft is held in place by a suitable screw 52.

vStar wheel 5l is formed with sides resem- 65.

bling the side walls illustrated in Figure 4.

This star wheel is formed with ten faces lor live points, though a larger or even smaller number could be used without departing from the spirit of the invention. lliheel 5l is positioned to act on the pin 58, which is held against the wheel by a spring 54, said pin having an enlargement or foot 55 bearing against the defiatable container or bag 56. This container is connected with a transparent tube 57 and acts in a similar manner to member 26 so as to cause the liquid therein to move back and forth over the scale 57. ln order to more readily hold the instrunient while the same is in use a linger hold 5S is formed integral with the arm l', though could be made separate and secured thereto if desired.

ln Figures 8 to il inclusive will be seen a further modiiied form of the invention to that shown in Figure 5. ln this form of the invention the arms l and 2 are provided with raclrs 5) and 60 respectively meshing continually with the worm 61, which is rigidly secured to, or formed integral with shaft 62 journaled in the cross bar 63 andV the section of the frame 43. A pair of side plates 64 are carried by the frame 43 through which the journal members 65 and 66 pass, said journal members being in the form of rivets and passing through the raclrs :'39 and GO so as to pivotally mount said racks. lhe frame 43 is provided with an opening 67 which accommodates a thumb wheel 68 and a hub 69 on which graduations YG are placed, said graduations co-acting with the graduations 7l on the frame 43. lllheel G8 is substantially hollow interiorly so as to accommodate the upper end of the collapsible bag Z2 which extends therein, said bag being connected in any desired manner to the transparent tube 73' so as to cause the fluid in the tube l2 to be forced along the graduations 74 as the device is operated. fr spring 75 is connected with the frame 43 and is provided with a pin Z6 which engages the walls 77 of the thumb wheel 68 so as to be moved in one direction thereby for collapsing the bag 72, said pin being moved in the opposite direction by spring 75. ln Figure 1l a live pointed star shaped opening is shown having ten walls so as to provide ten movements of pin 76 in one revolution of wheel 68.

lt will be noted that the same general principle is followed in modiiied forms shown in Figures 5 and 8 as that shown in Figure l, but the detail mechanism for shifting the arms of the caliper and for depressing the bulb 72 are slightly different. ln the structure shown in Figure 5 a rotation of the thumb member 48 will move the arms 1 and 2 and the degree of movement may be observed by watching the graduations 49 and 50 and Lalso the column of liquid as it moves through the tube 59, said liquid being of the same kind as used in the preferred form of the invention. It will be noted that in this form of the invention' only one arm is moved, while in Figure 8 the con-v struction is such that when the thumb member 68 is rotated both arms will be adjusted toward or from a central point andat the same time bulb-72 will be depressed and released alternately while the relation of the graduations and 71 will be changed.

Certain detail features have been. described in order to show clearly any embodiment of the invention, and how the inventive idea may be presented if desired, but it` `said means including a liquid indicator for indicating tliousandths of an inch.

2. A micrometer caliper comprising a pair of pivotally mounted jaws, means for opening and closing said jaws, a scale associated with said aws for indicating in large, divisions the amount of opening of the same, and means including a liquid column continually moving during the movement of said jaws, said means'being positioned ad-v jacent said scale and adapted to indicate in Jfractions of an inch the distance between said jaws.

3. A micrometer caliper oi' the 'character described, comprising a tube, a pair of caliper arms pivotally mounted on the tube, said tube-being formed with giaduations indicating Vthe amount `of movement ofsaid arms, means surrounding said tube connectcd therewith and with said arms for opening and closing said arms, and a liquid gage operated bysaid means for indicating a movement of said arms through a small distance.

4. In a micrometer caliper a pair of caliper arms, means for moving said arms to an open and closed position, a transparent tube, a collapsible bulb connected with said tube, said tube and bulb being provided withk a liquid, and a collapsible member for said bulb actuated by the arm actuating means for? collapsing the bulb at spaced intervals as said means is operated.

5. In a micrometer caliper of the charac-ii.`

ter described a pair of arms, a support for carrying said arms, means for pivotally* mounting said arms von said support, a rotatable barrel Jfor opening and closing said said support' ask said arms open and close, saidbarrel being formed interiorly` with aarms, said barrel moving longitudinally off star shaped wall, a transparent gage tube` carried by said support, a collapsibleibulb arranged at the end of said tube, a liquid arranged in said bulb, and a spring -pressed stylus carried bysaid support opposite said bulb and positioned vto, be engagedby the star shaped wall osaid barrelwhereby as the barrel is rotated the bulb will be `distended asv the stylus enters any point of said tween two points.

6. Ina micrometer caliper, a pair of caliper arms, means for pivotally connecting said arms together, one end otone ofs'aid arms being formedA with a frame having an opening. therein and the other with a rack, a worm mounted in saidy frame and positioned .1

to mesh with said rack, a manually controlledr member for rotating said worm, a' liquid carrying bulb,a transparent tube connected therewith, graduations arranged ad-` jacent said tube, and means foralte'rnatelyv collapsing yand releasing said bulb as saidy worm isfrotated.

7.. Ina micrometer caliper, a pair of caliper arms, meansfor moving saidk arms to an open or closed position, a transparent tube, a collapsible bulb connected with'lsaid i l 4vided with a liquid, ,a lstar-shaped coltube, saidjtube and said bulb being pro-v lapsing member ,for said lbulb connected with l' the means for moving said arms wherebyv whenever said arms are moved said bulb will be collapsed or releasedfor causing said liquid to travel along said tube. j 4

8. In a micrometer caliper of the character described, a pair of arms, means for connectingsaid arms together, a frame member rconnected with one of said'arms, a"-raclr connected-with the other of said arms, a worm wheel carried by said frame member and i' continually meshing with said rack, means for rotating said` worm wheel, and means connected with said worm wheel for indicating thousandths of an inch.

BENJAMIN NAHABED DUDUKIAN.

75 star and collapsed as it passes midway'be- 

